Machine for inserting metallic fastenings.



M. D. PHELAN. MACHINE FOR INSERTING METALLIC FASTENINGS.

APPLICATION FILED AUG. 10, 1906.

Patented Dec. 28, 1909.

8 SHEETS-SHEET 1.

M. D. PHELAN.

MACHINE FOR INSEETING METALLIC FASTENINGS.

APPLICATION FILED AUG. 10, 1906.

Patented Dec.28, 1909.

8 SHBETSSHEET Z.

M. D. PHELAN. v MACHINE FOR INSERTING METALLIC PASTENINGS.

APPLICATION FILED AUG. 10, 1906.

Patented Dec. 28, 1909.

8 SH S-SHEET 3.

g 7 I b.

M. D. PHELAN.

MACHINE FOR INSERTING METALLIC FASTENINGS.

APPLICATION FILED AUG.10, 1906.

Patented Dec. 28, 1909.

8 SHEETS-SHEET 4.

:4? 145 B m: Bx v i: we I 546 7 iF 5a 41 I5 4204M?! #WM.

M. D. PHELAN.

MACHINE FOR INSERTING METALLIC FASTENINGS.

APPLICATION FILED AUG. 10, 1906.

Patented Dec. 28, 1909.

8 SHEETS-SHEET 5.

as 87B mm 4% WW4;

M. D. PHELA'N. MACHINE FOR INSERTING METALLIC FASTENINGS.

APPLIOATION FILED AUG. 10 1906.

Patented Dec. 28, 1909.

8 SHEETSSHEET 6.

M. D. PHELAN.

MACHINE FOR INSERTING METALLIC FASTENINGS.

APPLICATION FILED AUG. 10, 1906.

r 944,275, Patented De0.28,1909.

8 SHEETS-SHEET 7.

Fig. 9.

Fig. 2

Inventor: 6M \flflm/ Jl'erwnDPIwlaw,

M. n. PHELAN. MACHINE FOB. INSERTING METALLIC FASTENINGS.

APPLICATION FILED AUG. 10, 1906.

7 4 275 Patented Dec. 28, 1909.

8 SHEETSSHEET 8.

stock, the lower part of the standard and the work-support or horn being omitted;

v MEETON D. PHELAN,

MENTS, TO MANUFACTURERS MACHIN UNITED STATES A CORPORATION OF NEW JERSEY.

OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- E COMPANY, OF MONTCLAIR, NEW JERSEY,

MACHINE FOR INSERTING METALLIC FASTENINGS.

Specification of Letters Yatent.

Application filed August 10, 1906. Serial No. 330,022.

To all whom it may concern:

Be it known that I, MnR'roN D. PHELAN, a citizen of the United States, and resident of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Machines for Inserting Metallic Fastenings, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawings representing like parts.

This invention relates to machines for inserting metallic fastenings into leather and it is more particularly applicable to so-called heel-seat nailers, employed in the manufacture of boots and shoes to secure the heelseat portion of the sole, the upper, counter, lining, and inner sole firmly together.

My invention comprehends various novel features of construction, arrangement and operation, and one of such features is improved means for beating down and holding the work or stock upon a work-support or horn while the fasteners are being driven and clenched to firmly hold and secure the connected parts. i i

My invention also comprehends novel and improved means for effecting the feed of the wire-like material from which the fasteners are cut, and for so regulating and measuring the feed that each fastener cut shall be of the proper length to correspond with the thickness of the stock or work upon the w ork-su 0 port.

My inventioh-also comprehends novel and improved means for effecting the operation of the awl and driver, which puncture the stock to receive a fastener, and drive the latter into the stock, respectively.

These and other novel features of my invention will be fully described in the subjoined specification, wherein one practical embodiment or my invention is explained in connection with the accompanying drawings, and the scope of the invention more particularly pointed out in the claims appended hereto.

Referring to the drawings :-Figure 1 is a front elevation of a machine embodying one form of my present invention, the awl being in position to descend and enter the Fig. 2 is a right-hand side elevation of the machine, the upper end of the work-support or horn being also shown; Fig. 3 is a similar view but with the movable or oscillating head raised, and with the work-feeding device projected; Fig. 4 is a central vertical sectional detail on the line 4-4;, Fig. 1, but some of the parts are in a different osition, to facilitate illustration of the mec anism; Fig. 5 is an enlarged transverse sectional detail taken on theline 5-5, Fig. 4, looking toward the right, of parts ofthe automatic wire-feeding mechanism and the mechanism which controls the movement of the carrier for the awl and driver bars; Fig. 6 is a similar view, but on the irregular line 6-G, Fig. 4, to illustrate details of the wire-feeding mechanism and parts cooperating therewith; Fig. 7 is a top plan view of details of the work feeding means. Fig. 8 is a right-hand side view of the lower part of the head, and the entire length of the supporting standard or column is shown, (partly in section), with the born or worksupport, the treadle by which the operative governs the operation of the machine, and a connection between the treadle and the clutch mechanism on the head, such connection being so constructed and arranged that transmittal of the oscillating or vibrating .movements of the head to the'treadle is prevented. Fig. 9 is an enlarged rear elevation of a portion of such connection, to be explained hereinafter. I

In the embodiment of my invention herein illustrated, the framework comprises a standard or column A, see Figs. 1 to 4, and 8, havin at its upper end an enlarged portion or ed A which supports a swin 'ng Patented Dec. 28, 1909.

or rocking frame or head B,'as it wil be hereinafter designated, adapted to beat down or hammer the work or stock, said head having suitably mounted thereon in bearings 1 a driving shaft 2', the head also carrying wire-feeding, cutting, and nailing or driving mechanism, scribed. The said shaft, Figs. 2,-3 and 4, is provided. at its rear end with a suitable clutch comprising fixed and movable members 3, 4, having opposed conical faces to cooperate one with the otherwhen the movable member is brought into engagement with the fixed member, the movable member 4 being herein shown as a pulley loose on the driving shaft, and moved away from the to be hereinafter deable member of the clutch with the fixed member, a loose collar -6 mounted on the driving shaft is provided with wedge faces 7 Figs. 3 and 4, engaging coiiperating wedge faces 8 formed upon a vertically sliding bar 9 suitably slotted to embrace the driving shaft and collar, the wedge bar 9 also sliding in a guide 10 suitably secured in a boss 11 on the rear part of the head B near its hinge or pivot. A coiled expansion spring 12 surrounds the wedge bar below the guide 1.0 and at its lower end bears upon a collar 12 Fig. 8, on said bar 9, to normally hold the latter down or depressed and the clutchv members disengaged. The lower end. of the wedge-bar is in practice connected in any suitable manner to alever or treadle T, Fig. 8, pivoted at T, depression of the treadle acting to elevate the wedge-bar and slide the loose collar and movable member of the clutch inwardly to engage the =fixed clutch member and rotate the driving shaft'in'well known manner. Means are provided to stop the driving shaft at a predetermined point of its rotation, and also to prevent stoppage of the machine before a completerevolution of the driving shaft has been made, and herein such means'comprise a bell-crank 13 carrying on its vertical arma roller or other stud 14, Fig. 4, running upon an annular cam surface 15 on the fixed clutch member 3, such surface having a recess or 'depres sion '16 of sufficient depth to enable th e.

' rock or swing vertically when the .wedgebar is elevated or depressed. When a part of the bell-crank (herein the roller 14) can swing rearwardl "into the recess 16, the outer arm of the ell-crank is depressed, and the latter, being connected with the wedgebar, is constantly under the tension of the spring 12, the latter normally acting to depress the bar whenever the roller 14 1s opposite the recessed portion of the annular surface 15. This annular" surface manifestly prevents the roller running thereon from moving toward the fixed member of the clutch, and thereby prevents depression of the wedge-bar by or through the action .of its spring the moment the treadle is released.

\Vhen, however, the recess 16 is opposite therolier, treadle release permits release 01' opening of the clutch, so that the fixed member stops with the roller 1n the recess, the

latter being positioned to correspond to. a,

predetermined point of therotation of the driving shaft. In such position of said shaftthe driver and awl are elevated, and

the work can be removed from or placed upon the horn, or moved thereupon.

The periphery of the clutch member 3 is preferably shaped to form a rotatable brake member 22 with which coiiperates a spring band 23 fnlcrumed at 24 (see Figs. 2 and 3) on the head B, the free ends of the said band being extended radially upward at 25, between rolls 26 carried by a lever 27 fulcrumed at 28 on the upper part of the head, the free and rearwardly extended end of the lever 27 being connected by an adjustable connection 29 with the upper end of the wedge-bar 9. The upturned ends 25 ofi the springband 23'are tapered so that when the wedge bar is depressed to release theggr,

clutcli members, the band is compressed to frictionally engage the annular member 22 to stop its rotation simultaneously with or immediately following the release of the clutch. Manifestly the operation of the wedge-bar to set the clutch lifts the arm 27 and rolls 26,,the spring of the brake band 23 then-acting to release the brake member 22. I

While the. clutch mechanism herein shown is well adapted for the purpose, my inventron is not restricted to the use thereof as any other suitable clutch device may be emloyed.

It will be understood that if the treadle is depressed to start the machine, and then released, the machine will be brought to a stop when the driving shaft 2 has made one complete revolution, but if the operator mamtains the treadle depressed the machine will continue to operate until the treadle is released and the roller 14 of the bell-crank can enter the. recess in the annular-cam surface on the fixed member of the clutch, hereinbefore described.

In practice the column or standard, on which is mounted the head B and the mechanism' carried thereby, is provided with a suitable work-support or horn 30, Figs. 2, 3 and 4. This horn in practice is pivotally and adjustably mounted to vary its distance from the normal position of the head B, to be hereinafter described, but otherwise said horn is stationary, andis not depressed or otherwise moved during the operation of the machine. i

The head B which is adapted 'to beat down the work supported on the horn is herein shown as pivoted or .hinged' to the bed A by trunnions 31 Figs. 2, 3 and 4, which enter and rock in suitable bearing hubs 32 on the bed A, shown 1, the trunnions 3 1 projecting oppositely and laterally from the rear portions of the head. As will be hereinafter explained, the

also in Fig.

eaaava head arranged to oscillate or rock about the trunnions as a fulcrum, the forward portion of the head above the horn, acting to deliver hammer blows upon the work or stock supported on the horn. The head is lifted by means to be described, and is sud denly released to descend and beat down the work and clamp it as the fastenings are driven and clenched, and to effect such oscillating movement of the head, the driving or operating shaft 2 is provided with a vcam 33, see Figs. 1, 2, 3 .and t, the operating face of which is adapted to bear upon the inner end of a substantially horizontal lever 34 Fig. 1, fulcrumed at 35 upon a vertical tubular support 36 carried by the bed A. The outer end 37 ofsaid horizontal lever is pivotally connectedat 38, see Fig. 1, with a laterally projecting arm 39 of the oscillatory or rocking head B. Rotation of the shaft 2 causes the cam 33 thereon to act upon the lever 34, 37, and lift the cam and the head B bodily, and then to drop it into its lowermost position or upon the work, if the latter be in position beneath. This 11fting and dropping or oscillation of the head occurs at every revolution of the shaft 2. As the head B swings or oscillates vertically about a fixed axis or fulcrum onthe bed A, and the lever 34, 37 about a fixed pivot 38 on the head, thetubular support 36, hereinbefore referred to, is connected with the head by a species of universal joint comprising pivots or joints 40, 11:1, to enable it to move. forward and backward and transversely. while at'the same time serving as the stationary support for the lever. To reduce wear on the cam-actuated end of said lever, I prefer to provide the same with a hardened steel wear-plate, as 42, see dotted lines Fig. 1.

The lever-fulcrum 35 is made adjustable vertically by means of an internally threaded nut 43 to cooperate with the lower, correspondingly-threaded end of the rod 44 on which the horizontal lever 34, 37 is directly fulcrumed, said nut and rod being sustained by the tubular su port 36. By changin the height of the ulcruni 35 from the be A the uppermost position of the head B is adjusted manually for the thickness of the work to be acted upon.

The metallic strip, rod. wire, or wire-like material W from which the fasteners or nails are formed, is led from a suitable reel, not shown, at the top of the machine, down through a vertical channel 45, see Figs. 4 and 6, in the lower part of the shifting carrier for the awland driver bars, to be presently described and passes thence between a fixed vertical abutment 46 and an opposed cotiperating detent 47 having a toothed or corrugated wire engaging face i 6, the detent being fulcruined at 49, and in the present instance its face 48 is pressed against the wire by. a suitable spring 50. The abutment i6 is formed on a block 51 rigidly secured to a horizontal guide 52, on the lower front portion of the head B, said block 51 having asocket therein to receive the fixed cutter 54 herein shown as slabbed off or flattened at 55, and provided with a it shaped groove 56, extending longitudinally of the cutter. The latter isheld from rotative movement in its socket by a suit-able pin 57, Fig. at. The cutter and the block 51 are provided with vertical and alined. passages 54*, and 51* respectively, through which the leading end of the wire passes.

The coiiperating movable cutter 58 is herein shown as-a flat block rigidly secured to a cutter carrier 59, horizontally movable fore and aft in the guide 52, the upper face of the said movable cutter 58 sliding upon the lower, flattened face 55 of the fixed cutter 54, the groove 56 in the latter being entered by a correspondingly shaped rib 60 on the movable cutter.

A nail receptacle 61 extends vertically through the cutter 58 and the adjacent portion of the cutter carrier 59, the latter slid ing at its forward end u on a foot 62 at the front of the head, said oot being provided with a throat 63 through which the nail or fastener is driven into the work. The nail receiving passage 61 intersects the rib 60, as shown in F ig, 4, and the perforated portion of the. cutter carrier 59 serves as a nailtransferrer to transfer the severed nail or fastener into driving position above the throat 63. At the time the wire \V is fed,

the passage 61 is in alinement with the passages 51 .54", and the wire-feed having taken place, the cutter-carrier 59 is then moved forward until the passage 61 registers with the throat 63. As the carrier is so moved forward, the end of the rib 60 behind the nail-passage 61 cuts or severs the measured length of wire from the main body of the wire above it, and owing to the shape of the cutting rib and the move 56 in the fixed cutter, the leading on of the nail or fastener next to be formed is notched, while the upper end of the fastener just severed is pointed. The reciprocatory movement of the carrier 59 to sever the nail or fastener, transfer the latter to driving position. and thereafter to return the nail-transferrer and movable cutter into wire-receiving position, is efieoted by means of a cam 6 1 Fig. 4 fast on a spindle 65 mounted in suitable hearings on the head B, and provided with a bevel gear 66 in mesh with and driven by a similargear 67 fast on the driving or operating shaft 2, as-will be clear from an inspection of Fig, 1. The cam 64 cotiperates with a box 68 slotted at 69, Fig. 4, to receive the spindle and adjustably connected at 70 with the rear end of the cutter-carrier 59. A col- 1211' 71 pinned'to the spindle 65 prevents any lifting movement of the box as it slides on the base portions B of the head.

\Vhile the detent 47 will give or move on its fulcrumto permit the feed of the wire, it will be manifest that any retrograde movement of the latter will be prevented by such detent, as the wire will thereupon be gripped or clamped between the face 48 of the detent and the abutment 46.

I will now describe the mechanism for feeding the Wire, and the means by which the amount fed-at each operation is deter mined automatically in accordance with the thickness of the stock or work into which the next fastener is to be driven.

The head drops upon the Work prior to the feed of the fastener material, and manifestly the foot 62 which. beats upon the work will descend more or less, as the stock is thinner or thicker, and this variation in the descent of the head is made effective to absolutely and positively control and measure the length of wire to be fed at each operation of thewire-feeding mechanism.

A substantially-horizontal rock-shaft 72,

' Fig. 6, mounted in a long bearing 73 on a bracket 73*, rigid with or forming part of the head, see'Figs. 1 and 6, and in parallelism with the shaft 2, has fast upon it at its rear end an arm 74:, Fig. 5, pivotally connected at 75 to an upturned radius bar 76, clearly shown in Fig. 5, and also in Fig. 4, the upper end of said bar carrying a pivotally-connected block 77, slidably mounted in a T-shaped, curved guide-Way 78formed in a segment'7 9, forming part of a yoke 80 ful crumed on the head on a stud 81. The yoke 80 cooperates with a cam 82 best shown in Fig. 5, fast on the operating shaft 2. lVhcn the yoke 80 is at rest, by cooperation with the dwell portion of the cam, and the'arm 7a in the position shown in Fig. 5, the parts are in readiness for the thickness of the work or stock to be measured, and for the setting of the wire-feed mechanism correspondingly,

and at such time, the block 77 can be moved toward or away from the fulcrum 81 Without rocking the shaft 72. This neutral position of the parts enables the setting operation to be performed Without in any way moving the Wire-feeding devices, which as will appear hereinafter are actuated by or through the rock-shaft 72.

The pivot stud 83 connecting the radiusbar and the block 77 serves also to connect thelatter with one end of a link84 jointed at 85, see'Fig. 5, to'the longer arm 86 of a bell-crank fulcrumed at 87 on the main head. The shorter arm 88 of the bell-crank is jointed to an upright link 89 pivoted at 90'to an car 91 extending inwardly from a vertically movable slide 92 supported in guides 93 on the head, see Figs. 1, 2, 3, 5 and 6. The slide 92 has pivoted to its lower end at 94 a yoke 95 connected by an adjustable coupling 96 with a similar yoke 97' jointed at 98 to one end of a lever 100 fulcrumed at 99 between its ends on a bracket 101 secured to or forming a part of the bed A. The connection between the forward end of the lever 100 and the slide 92 provides for any desired or necessary adjustment between the parts. The opposite. end of lever 100 is connected by a short link 102 to the head B by the projecting end 103, of the pin 20. When the head rises or is swung upward, the rear end of the lever 100 will be lifted a certain distance, and the front end of said lever depressed an equal amount, and the slide 92 Will be moved downward a like distance. In like manner, the descent of the head, Whether more or less, will through .the transmitting lever 100 impart tothe slide 92 precisely. the same lift or rise, and the slide through the intervening connections, such as described, will move the block 77 correspondingly toward the fulcrum 81 of the segment 79. 'Manifestlythe amplitude of the oscillation of the rockshaft 72 will be greater or less as the block is farther from or nearer to fulcrum 81, and if. the thickness of the stock into which a fastener is to be driven increases, the head will not descend so far as it did previously. Consequently by the means described, the slide 92 will be elevated a less distance and the block 77 will be set farther from the fulcrum 81, so that the rock-shaft 72 will be turnedthrough a greater arc. Conversely if the stock decreases inthickness, the head will descend farther, the slide 92 will have a greater rise, and the block 77 will be set nearer the fulcrum 81, decreasing the feed for the Wire.

I have herein shown and described a convenient, practical and eflicicnt form of equalizing connection between the head of the machine and the slide, 'Which latter forms a part oftheinstrumentality adapted determined by the measuring of the stock ill) by or through the oscillating or rocking head, the slide also governing the stroke of the awl. The great disparity in length between the hell-crank arms 86, 88 provides a considerable variat on in the position of the block 77 for an extremely slight variation in the thickness of the work or stock, so that the feed is regulated and controlled with great cxactness- At the front end of therock-shaft 72, see Fig. 0, a rigidly attached arm 104; is extended toward the center of the head, and it is longitudii'ially slotted at its free end to receive a block 105 pivotally connected at 10s to the shank 107 of a movable jaw 108 fulcrumed at 109 on a jaw-carrier 110, shown as an arm mounted with a frictional seams fit on the rock-shaft 72, and provided with a jaw 111. which overhangs and has its working face opposed to the preferably toothed face 112 of the jaw 108. The jaw 111 has a guide passage 113, see dotted lines Fig. (3, through which the wire W passes, and thence leads between the opposed faces of the jaws 108, 111 to the duct 45. then the rock-shaft 72 is turned in the direction of the arrow 114 Fig. 6, the arm 104 first swings the jaw 108 upward on its fulcrum, unelamping the wire, and then the jaw-carrier 110 moves in unison with the arm 104, the friction of the jaw-carrier being overcome. The swinging movement is determined, as has been described, by the location of the block 77 with respect to the segment fulcrum 81, and when the time for feeding the wire arrives, the rock-shaft 72 is turned oppositely to the arrow 114, swinging downward the arm 104, the first action thereof bein to swing the jaw 108 on its pivot 109 Sn ciently to clam the wire between the feeding jaws, the riction at first holding back the jaw-carrier. The continued downward swing ofthe arm 104 then overcomes the friction and moves or feeds the wire forward throughout such stroke of the arm 104, the jaw-carrier 110 moving with the arm. Thls feed stroke having been I predetermined as described, precisely the right length of wire is fed forward for the next fastener to be severed therefrom, such severed fastener when driven into the work being neither too long nor too short, but of the proper length for the thickness of the work at that particular point.

I have provided an awl a, Fig. 1, to puncture the work to receive a fastening, and I have provided a driver (l to drive the fastenmgs into the work then upon the horn or work-support 30, said awl and driver being herein shown as attached respectively to the lower ends of vertically reciprocating barsv (1*, d". The awl and driver bars are mounted in a laterally sh'iftable carrier 115, completed by a cover plate 116, located atthe front of the head and provided with pairs extended, horizontal trunnions 117, mounted to slide longitudinally in bearings 118 on the front of the head'B,

so that the shifting carrier can move latorally, such movement being provided to bring either the awl or the driver into operative-,position above and in alinement with the throat 63' A short link 119 pivotally eonnected to the carrier at 120, ig. l, is jointed to the free end of a depending 'roeker-arm121, fast on a rock-shaft 122, see

Figs. 1 and 6, mounted in a. bearing, on the head, the rear end of said rock-shaft having a rigidly attached yoke 124 with which cooperates a cam 125, fast in the operating shaft 2, the shape of'the cam being shown in dotted lines Fig. 6, and in full and dotted lines Fig. 5. The cam 125 is of such shape that when its dwell portion cooperates with one side of the yoke, the shifting carrier 115 will be held stationary with the awl and awl-bar in operative position, and when the dwell portion of the cam acts upon the other side of the yoke. the driver and driver-bar will be operatively positioned, and in Fig. 1 the awl is shown in its operative position, but out of the work. p

The awl and driver bars are vertically reciprocated by separate mechanisms, and the operation is peculiar in the following respects. The length of the stroke of the awl relative to the rocking head, is variable an is such as to cause the awl always to descend to substantially the same fixed point relative to the lower surface of. the work on the horn, irrespective of the thickness of the stock and the consequent position of the rocking head. The length of the stroke of the driver, however, relative to the rocking head, is constant, causing the driver to descend to a point whose location is variable and depends upon the position of the head, but which bears a fixed relation to the upper surface of the stock, whatever the thickness of the latter.

The upper end of the slide 92, Figs. 1 and 5, has av transverse, tubular head 126 parallel to the operating shaft 2, and which forms a bearing for a rock-shaft 127 provided at its front end with a rocker-arm 128, see Fig. 1, longitudinally slotted to receive a slide block 129, pivotally connected to the upper end of the awl bar a". The rear end of the rockshaft 127 has rigidly secured to it a depending arm 130, provided with a follower 131, in practice a roller or other stud, which enters' a cam-groove 132, see Fig. 5, and partly shown in Fig. 1, formed in the face of a disk 133, rigidly secured to the operating shaft 2. Rotat1on of the shaft operates through the said cam-groove and follower 131 to rock the shaft 127 and. the rocker-arm" 128 to positively raise and lower the awlbar and awl. Inasmuch as the shiftin carrier 115 rises and falls with the head the awl would descend farther when working on thin stock, and not so far when working on thicker stock, were it not for the fact that the awl-operating mechanism compensates for variations in the lowermost position of the head due to variations in thickness of the stock by means of the slide 92. The greater the-descent of the head, the higher will the slide 92 be elevated, and correspondingly the follower 131 will be raised, changing its position with respect-to the center of the cam 132, so that the down-stroke of the awl will be diminished, relatively to the downward movement of the head. Conversely, when acting u on thicker stock, the head will descend a ess distance thereonto, the slide 92 will not be raised so high, and the stroke of the awl will be correspondingly increased, relatively. The point of the awl therefore at all times reaches the same level (on its down stroke) with respect to the tip of the horn or work-support, so that the Work is properly punctured, no matter whether it be thick or thin.

The driver bar d is pivotally connected at its upper end to a block 134 slidably mounted in the longitudinally slotted end of a rocker-arm 135 fast on a rock-shaft 136 mounted in a bearing arm 137, Fig. 1, forming a rigid part'of the head B, said rockshaft 136 having also. rigidly'attached to it a depending arm 138 provided with a follower roll 139, which travels in the camgroove 132, hereinbefore referred to, but on the opposite side of the'center of the cam with relation to the follower 131. The said cam, therefore, effects the reciprocation of both the driver and the, awl, but at different times, and while the stroke of the awl is such as to cause the awl always to descend to the same fixed point, the lower limit of the stroke of the driver varies inasmuch as the rock-shaft 136 is fulcrumed on the head B, so that when the latter descends upon thick stock the driver will not descend as far as when the head is working upon thin stock.

This-is as it should be, for the nail to be driven in thick stock is longer than one for thin stock, and hence the variable level to which the driver descends conforms to the length of the nail or fastener which has been previously out off, and transferredinto position to be driven into the work by the descent of the driver-bar and clenched upon the horn, while the heavy head B clamps the work on the horn during the driving and clenching of the nail.

A preferably spring-controlled, workfeeding bar 140, Figs. 2 and 4, is adjustably mounted in the outer end 141 of a feed bar carrier 142, longitudinally slotted at 143, Fig. 4, to receive a stud 145, which connects a bottom-plate 146avith the fixed guide 147 in which the feed-bar carrier is longitudinally and also laterally movable, such lateral movement being about the stud 145 as a center. The feeding bar 140 is provided with a tip 140 preferably of rubber, the tip bearing against the shoe mounted on the horn, and the movements of the feed-bar in the operation of the machine feed and turn the heel of the shoe orotherwork, to provide a desired uniform spacing between the nails or fasteners as they are driven, it bein necessary for the operator only to steady the work on the horn. A four-motion feed is herein shown, the actuating cam 148 being secured to the spindle 65, see Fig. 4, and it is inclosed within a box 149 slidable within a recess 150 in the head B, the cam and box being shown in plan in Fig. 7. The forward portion of the box is provided with ears 151, between which is pivotally mounted a sleeve 152 through which slides an upright stud 153 rigidly secured to the rear end of the feed-bar carrier 142. The guide 147 in which the said carrier moves is secured to or forms part of the bed A, hence the necessity for the compensating connection just described between the cambox 149 and the carrier, as the cam and its box are mounted on the oscillating head B. The 'four motions of the feed-bar are forward into position to engage the work, laterally to feed the work, rearwardly away from the work, and then again laterally, but in an op osite direction to bring the tip of the feedar by the next forward movement into engagement with the work, the controlling-cam 148 being of such shape and so timed as to effect feed of the work while the head is up, the subsequent movements of the workfeeding device taking place after the head descends and beats down and clamps the work upon the horn during the'nailing operation. These four motions are produced by the engagement of thecam 148 with the four walls of the box 149, the feed bar sliding and being guided between the fixed guide 147 and the bottom plate 146. .l'n'its lateral feeding, and return movements the feed-bar turns upon the pin as a fulcrum, while in the forward and rearward movements of said bar the. pin 145 slides in the slot 143.

When single nailing is performed the operator depresses the starting-treadle T, Fig. 8, to elevate the wedge-bar 9 and throw the clutch into operation, and immediately releases the treadle,-the machine stopping automatically when its cycle of operations is completed, as has been described, a single nail or fastener being formed and inserted in the work. Ordinarily, however, in heel seat nailing, the operator holds the trcadle depressed throughout the nailing, the machine performing as many complete cycles as there are fasteners formed and driven, the action being very rapid, the headoscillating or rocking at great speed. It will be remembered that the guide 10 for the wedgebar is 'mounted on the head, and consequently said bar must partake of the rapid movements of the head,,vibratin'g in a vertical plane at right angles to the fulcrum 31 on which saidhead rocks. If the wedgebar is connected directly with the treadle,

the latter will be rapidly vibrated or rocked up and down While the machine isin motion, such vibrating or arring movement be-' ing transmitted forcibly and directly to the operator and not only quickly tiring him,

but also interfering with a steady control of I the work by his hands as it is fed over the horn. I have herein shown simple and eflicientconnecting means intermediate the treadle and the clutch-controller or wedgement of the head the treadle remains prac-.

tically quiescent, completely obviating the objections herein referred to.

Referring to Figs. 8 and 9 the lower end of the wedge-bar 9 is provided with a crosshead 154 to the ends of which are pivoted at 155 the lower end of short links 156, their upper ends being connected by pivot-pins 157 with rearwardly extended ears 158 on a slide block 159 vertically movable on a flat support 160 formed on the standard or column A. The slide-block is bifurcated at 161, Fig. 9, to loosely receive the-shank of a headed guide and retaining bolt 162 secured in the column, so that the block can rise and fall vertically on the plane surface of the support 160. The sides of a stirrup 163 are pivotally connected at their upper ends with and suspended from the slide-block by the pivot-pins 157, the cross-head 154 being free to swing within the stirrup and above the bottom 164 thereof, as will be manifest from Figs. 8* and 9. Rods 165 are rigidly attached at their upper ends to the stirrup and at their lower ends are ivota-lly connected at .166 with the treadle T, Fig. 8,

fulcrumed at T as previously stated, withinthe base of the standard or column A, theend of the treadle being interposed between the lower ends of the rods 165. Depression of the treadle elevates said rods and the attached st rrup, and thereby the links 156 are raised to pull up the cross-head 154 and attached wedge-bar, throwing the clutch into operation to start the machine, the block 159 sliding upward and causin the pivot-pins 157 to move in "paths para lel thereto. As the head B 'is rocked. or oscillates during the operation of the machine the wedge-bar 9 will vibrate in a vertical plane at right angles to the fulcrum of the head, the cross-head 154 on the lower endof the said bar being moved thereb toward and away from the column A wit in the stirrup,but in a short, flat arc. The links 156 swing slightly on their fulcra 157 by such movement of the cross-head relatively to the stirrup, but without causing any appreciable vertical movement of such fulcra or of the stirrup depending therefrom, and the curvature of the short are through which the lower ends of the links move '18 so flat, that appreciable vibration is transmitted no through the rods 165 to the treadle. The connection thus provided between the treadle and the wedge-bar is positive in its action to operatively move the wedge-bar, while at the same time it takes up and absorbs or so minimizes vibrational movements of the to thereby anism can take place, as

head and the wedge-bar that transmission thereof to the treadle is practically prevented. Throughout the operation of the machine, therefore, the'treadle is at rest and substantially free from vibration. so that there is nothing to interfere with the proper guidance of the work by the operative, no matter how rapid or long continued the oscilla'tory movements of the head; The slideblock 159 serves to guide the upper end of the stirrup and the pivot-pins 157 in a fixed path with relation to the stationary support or standard A on which the oscillating head is mounted.

In the operation of the machine the operator places the work, such as a shoe, upon the horn with the heel portion or counter against the feed-bar and with the part of the heel-seat atwhich nailing is to commence directly under the throat in the footplate of the head.' The operator then depresses the treadle to release the brake and throw into operation the clutch to start the machine. As the driving or operating shaft rotates the head B, which is then in its raised position, is dropped, the foot plate falling with a species of hammer blow upon the work, compressing and clamping it upon the horn, and the feed bar is then retracted. As the head descends the shifting carrier for the awl and driver bars is moved to the left, viewing Fig. 1, to bring the awl into operative position in alinement with the throat 63, while the cutter-carrier 59 has been retracted to bring the nail transferring device, Which herein includes the movable cutter, into. position to receive the leading end of the wire. The awlnow descends through the throat and pierces the work, forming the hole into which the next fastener is to be driven, and then the awl is at once retract-ed. During the descent and retraction of the awl the slide-block is set in the segment 79 determine the proper length of be fed forward by the feedto form the *fastener to be wire which is to ing mechanism, driven'into the by the awl. "Such setting and determination of the length of feed of the wire is made at a time when no movement of the feed mech- The wire-feeding mechanism is thenoperated and the predetermined measured length of wire is fed forward into the nail transferrer just before the awl is fully retracted. The shifting carrier is moved to the right, viewing Fig. 1, after the retraction of the awl, to bring the driver into operative position in alinement with the throat, and the cutter-carrier is moved forward, the fixed and movable cutters coiiperating to sever the measured nail or fastener, as has been de-- scribed, and as the forward movement of the cutter-carrier is completed thesevered 119.11

is thereby transferred into position to be hole in the work just made has been explained.

driven through the throat and into the work in the hole made by the awl. The driver is now depressed, descending upon the upper end of and driving the nail from the transferrer through the .throat and into the aw'lhole in the work, the points or rongs at the lower end of the nail being 0 embed upon the top of the horn. The Wire-feeding mechanism, which has'been at rest since the feed of the wire was completed, is also returned to its initial position, and the driver is lifted, the return of the said feed mechanism to its initial position being accomplished during the descent and rise of the driver. During the piercing of the Work by the awl, and the subsequent driving of the nail or fastener, the head has remained down upon the work, clamping it securely upon the horn after it has been beaten down and compressed, so that the parts to be united are rmly secured without possibility of subsequently opening or separating from each other As the driver rises the head is lifted, releasing the work, and the work-feeding bar, (which in the meantime has moved back from the work, then laterally and again forward into engagement with the work at a new point), advances the work' into position for the next descent of the awl thereinto. As the head is lifted the nail transferrer begins its retractive movement to the position 1n which it receives the end of the wire at the next operatonof the wire-feeding mechanism, and the shifting carrier is moved to the left to-bring the awl and driver into normal position, at points equidistant from a vertical line passing'through the throat. The cycle of operations is now completed, and the parts are in normal osition, with the head lifted, the awl and iver up, and the, various mechanisms in readiness to re peat the cycle. I

' The work feedingcam is positioned 0r timed to cause the work-feeding means to feed the work forward the proper distance after a nail or fastener has been driven and clenched, thereby positioning the heel-seat so that; the next awl-hole and nail driven thereinto shall be uniformly spaced from the last nail driven. .The 0 erator steadies the work as it is fed along y repeated cycles of operations until the nailing is com pleted, the operator maintaining the treadle depressed until the desired number of nails has been driven,fwhereu on he releases the treadle to stop the mac ine. Stoppage of the machine'can only take place when the recess in the annular cam path onthe fixed member of the clutch is opposite the co- 0 crating roller, when the latter moves into.

omaticallyt e recess and the clutch is aut released and the brake applied, The recess is so positionedthat the maehine'will sto only when the head is lifted and the aw and driver bars up and completely out v the treadle, the machine will perform a complete cycle ofoperations, piercing the work, measuring and feeding the wireto form a fastener or nail of'the proper'length, severing such fastener, and driving it into the awl-hole, the entire mechanism coming to rest at the completion of the cycle.

Referring to Fig. 8, the horn or work support 30. is shown as pivoted horizontally at 170 in the-forked upper end of a horn carrier 171 adjust-ab] mounted on an upri ht arm 172 of the co umn,-the horn ree to be tipped about its said fulcrum from back to front to permit removal and 'appli cation of the work therefrom and thereto. If not locked in work supporting position, this horn'might fall I' away from the feed and render the latter ineffective as Well as the line of work untrue. To obviate this, I have provided the lower end of the horn beneath its fulcrum 170 with a-tapered recess adapted to receive the tapered upper .end of a horn-locking rod 173 mounted to slide in suitable bearings provided in the column or parts thereof and connected at its lower end with an auxiliary or'operatinglever 174, shown in dotted lines, and fulcrumed at 175 on a bracket extended frontward from the column; The front end of this lever is con-- structed to embrace the outer end of the treadle T, a set screw17 6 furnishing means for adjusting theengagement of the treadlelever with said rod-operating or auxiliary lever to determine the movement of the latter by the former, so as to cause the move- -ment of one to be co-extensive with the other or to present a given though variable lost motion of the one relative to and by the other as occasion may require. By this arrangement when thetreadle is depressed to start the machine the locking rod 173- is elevated to lock the horn in work su porting position where it remains until the treadlei's released to stop the'machine'when said locking. rod will be dropped to free the horn to permit it to be tipped forward for removal of the work.

Having fully described my invention what I claim as new and desire to seeureby Let 12o ters Patent is p 1. In a nailing machine, in combination, a movablehead to beat down the work, an awl mounted on the head, and means'to impart a variable operative movement to the awl relative to the head and dependent-upon, the amplitude of movement of the head.

2. In a machine for inserting metallic fastenin ,in combination, a vertically movable hea adapted to descend; upon the work from a constant height, mechanisms carried by said'head to feed wire-like material, sever a fastener therefrom, and drive the severed fastener into the work, a common primary operating member for said mechanisms, also carried by the head, and means set by the descent of the head to cause the feed mechanism to feed a variable length of the wirelil-zie material according to the thickness of the work into which the fastener is to be driven. Y

3. A nailing machine comprising a movable head having a variable descending stroke, and a reciprocating awl mounted on the head and having a variable'operating movement relative to the head and dependent upon the descending stroke of the head.

4. In a machine for inserting metallic fastenings, in combination, a work beating and clamping head, intermittin-gly operated mechanisms carried thereby to feed wirelike material, sever measured fasteners therefrom, and drive the fasteners into the work, and means, governed by and acting upon operative movement of the head to engage the work, to set the feed mechanism to feed a measured length of wire-like material adapted to the thickness of the work, the feeding mechanism being constructed and arranged to prevent any movement thereof until after the setting means has operated.

A nailing machine comprising a movable head having a variable descending stroke, and a reciprocating awl mounted on the head and having an operating movement terminating iii, a substantially fixed point.

6. A nailing machine comprising a movable head the operative stroke whereof is variable inversely to the thickness of the work, an awl mounted on the head, and means to impart to the awl on it's operative stroke a throw terminating at a substantially fixed point.

7. A nailing machine-comprising a movable head the operative-stroke whereof is variable inversely to the thickness of the work, a relatively stationary work-support, an awl mounted on the head, and means to reciprocate the awl, said means bein constructed and arranged to cause sai awl always to descend to the same point with relation to the work-support irrespective of the thickness of the work.

8. A nailing machine comprising a movable head theoperative strokewhereof is terminated by engagement with the work and varied inversely as the thickness thereof, a reciprocating awl mounted on the head, a relatively stationary work-support, and means to cause the point of the awl to move to a uniform distance from the work-support at each descent.

9. In a nailing machine in combination, a vertically movable head having a variable operative vertical stroke, an awl movable with and also relatively to the head, and means to impart an operating stroke to the awl terminating at a substantially fixed point.

' 10. In a nailing machine, in combination, a movable head having a. variable operating stroke governed by the thickness of the Work, a reciprocating work-puncturin awl movable with and relatively to the hea and compensating or equalizing means intermediate the awl and head to impart to the former a stroke terminating at a substantially fixed point irrespective of the operatv ing stroke of the latter.

11. In a nailing machine, in combination, a rocking head having a variable operating stroke governed by the thickness of the work, a reciprocating work-puncturing awl movable with and relatively to the head, mechanism to feed wire-like material from which the nails are severed, equalizing means operated by the head on its operating stroke, and connections between said means and the awl and feed mechanism, to impart to theawl an operating stroke terminating at a substantially fixed point and to cause the feed mechanism to feed a length of the wirelike material adapted to the thickness of the work. y

12. In a nailing machine, in combination, a horn, a rocking head carrying wire-feeding, severing and nailing mechanisms, a work-puncturing awl reciprocable with and relatively to the head, and means governed by the work-engaging stroke of the head to cause said mechamsms to feed, cut and drive a nail adapted to the thicbless of the stock,

and also to-cause the point of the a'wl to descend a uniform distance from the horn on each operating stroke.

13. A nailing machine comprising a movable head adapted to beat downand clamp the work and having its operating stroke variable inversely to the thickness of the work,

, a reciprocating awl and a reciprocating driver, both mounted on the head, the limit of the-efiective stroke of the driver varying in accordance with the thickness of the work, and means to impart to the awl an opera-tin stroke terminating at a substantially fixe point.

14, A nailing machine comprising a movable head the operative stroke whereof is variable inversely to the thickness of the work, an awl mounted on the head, and means to impart to said awl a stroke which is variable relative to said head. t

15. In a nailing machine, a support, a fixed horn, a head provided with means to lift itself relatively to the support, the descent of the head bein with the work on sat horn, anawl and mechanism to reciprocate it, mounted on the head, and controlling means for said mechlimited. by contact anism to impart to the awl a stroke terminating at a substantially fixed point.

16. In a machine for inserting metallic fasteners, a vertically rocking or swinging head to clamp the work, an awl movable with and also relativel to the head, mechanism to reciprocate t e awl to enter and leave the work, and means, including a lever fulcrumed independently of the head, to govern said mechanism and impart to the awl a stroke terminating at a substantially fixed int.

17. In a nailing machine, in combination, a movable head having a variable operating stroke governed by the thickness of the work, a reciprocating work-puncturin awl movable with and relatively tosai head, and compensating or equalizing means intermediate the awl and head to impart a variable operative movement to the awl relative to ihelead, dependent upon the stroke of said 18. In a nailing machine, in combination, a rocking head having a variable operating stroke governed by the thickness of t e work, a reciprocating awl movable with and relatively to said head, mechanism to feed wirelike material from which nails are severed,

' equalizing means operated by the head on ward and from the fulcrum of t e latter, to.

its operating stroke, and connections between said" means and said awl and feed mechanism to impart a variable 0 erating stroke to the awl relative to the hea and to cause the feed mechanism to feed alength of the wire-like material adapted to the thickness of the work.

19. In a nailing machine, in combination, a vertically-movable head provided with means to lift it andadapted to descend upon and beat down the work, wire-feeding mechanism, including a rock shaft, a jaw-carrier loose thereon provided with relatively movable jaws to grasp the wire, an operating member fast on the rock-shaft and ada ted to open and close the jaws and to osci late them in unison, to feed and to return to initial position, and means governed by the thickness of the work to rock said shaft a variable amount and thereby regulate the f teners, a rocking and clampthe wor a rotatable cam and a feed stroke of the jaws.

' 20. In a-nailing machine, in combination,

a vertically movable head provided with means to lift it and adapted to descend upon and beat down the.work,-.w1re feedmg mechanism, inciludilag 'a rock-shaft and feeld-jaws operated t ere y a rocking segment avmg a fixed fulcrum: connections between the rock-shaft and segment and. ad'ustable to+ rock the shaft varying amounts according to the length of wire to be fed by the jaws,

' and a setting device for said connections 'overned by or through the descent-of the l iead upon the work. v r

21. In a .nailmg machme, a support, a

.fixed born, a head provided with means to mechanism to reciprocate said awl, mounted on the head, and controlling means for said mechanism to impart a. variable stroke to said awl relative to said head.

122. In a wire-nailing machine, a movable head provided with a shaft, means actuated by the shaft to move the head, wire-feeding, severing and nailing mechanisms carried by the head and operated in a predetermined sequence by movement of the shaft, means to move the latter, means actuated by operative movement of the head toward the 'work to set the wire-feeding mechanism before its operation, to thereb cause a measured length of wire to be ed, an intermittinglyreclprocated awl-mounted on the head, and means to impart to the awl a stroke terminating at a substantially fixed point irrespective of the extent of operative moveing head, a relatively stationary horn, an

awl and a driver, a cam, and separate operating connections betweemit and the awl and driver, all mounted on the head, the limit of the stroke of the driver varying with the movement of the head, and means to change the relation between said cam and, v the awl-operating, connections by or through variations in the movement, of the head, whereby the awl descends to the same point o n each; operative stroke.

25. In a machine for inserting metallic head to descend upon reciprocatil awl mounted on the head, con

--nections, 111C uding a cam-follower, between said cam and awl, to reciprocate the latter, and means governed by the descending movement of the head to va follower relatively. to

the position of the e cam, whereby on its operative stroke the awl invariably reaches the same point; g j v 26. In, a machine; for inserting metallic fasteners, a stationaryihorn, a work-clamping head movable toward and from it; a reciprocating awl mounted on the head, a slide on the head, means controlled by the slide to lengthen or shorten the operative stroke of the awl, and slide positioning means aceaaave tuated by the movement of the head toward the work. increase in such movement acting through the slide to shorten the awl stroke, and vice versa.

27. A nailing machine having, in combi nation, a movable head adapted to beat down and clamp the work, a slide movable with and relatively to the head, work-puncturing mechanism and fastener forming mechanism, both mounted on the head, connections between said mechanisms and the slide, to govern the operation thereof, and an equalizing device controlled by operative movement of the head to change the relative H position of the slide thereon in accordance with the thickness of the work.

28. A nailing machine having, in combination, a head having self-contained mech unisnl to elevate it and permit it to descend upon the work, a fixed support for the head, a slide on and movable relative to the head, means, including an equalizing lever fulerumed on the support, to raise or lower the slide more or less as the head descends a greater or less amount, and wire-feed mechanism operatively connected with the slide, to vary the feed inversely as the distance the head descends. I

25). A nailing machine having, in combination, a. head having self-contained mechanism to elevate itand permit it to descend upon the work, a fixed support for the head, a slide on and movable relative to the head, an equalizing lever fulcrumed midway between its ends on the sup ort, links pivotally connecting the head an slide, to move the latter on the head op ositely and proportionally to the descent of the head, Wire-feeding mechanism and a reciprocating awl, both carried by the head, and controlling connec' tions between said mechanism and awl and the slide, to impart to the awl a stroke terminating at a substantially fixed point and a variable feed movement to said mechanism, such feed movement varying with the thick ness of the work,

30. In a nailing machine, a movable head, means, including an operating shaft on the head, to lift the latter, a cam thereon, two followers cooperating therewith, awl and driver bars, connections between them and the followers, to effect reciprocation of said bars, intermittingly operating wire-feeding mechanism, and means governed by the operative movement of the head to vary the feed of said mechanism according to the thickness of the work. v

31,- In a nailing machine, a rocking head, means includingan operating shaft on the head, to lift the followers cooperating therewith, driver bars. connections between awl and them and the followers, to efiect reciprocation of said bars, intermittingly operating wire-feeding mechanism, means,

latter, a cam thereon, two

operative str including a slide movably mounted on the head and governed by the operative movement ofthe head, to vary "the feed of said feeding mechanism according to the thickness of the work, and a connection between the slide and the awlbar actuating follower to change theposition of the same relative to the operating cam, whereby the stroke of the awl-bar is increased with the thickness of the work, and vice versa.

32. A nailing machine comprising a movable head adapted to beat down and clamp thework and having its operating stroke variable inversely to the thickness of the work, a reciprocating awl and a reciprocating driver, both mounted on the head, the effective stroke of the driver relative to the head being constant, and means to impart to the awl an operating stroke terminating at a substantially fixed point. A nailing machine comprising a movable head adapted to beat down and clamp the work and having its operating stroke variable inversely to the thickness of the work, a reciprocating awl and a reciprocating driver, both mounted on the head, the effective stroke of the driver relative to the head being constant, and means to impart a variable operative stroke to the awl relative to the head.

34. A nailing machine comprising a movable head adapted to beat down and clamp the work and having its operating stroke variable inversely to the thickness of the work, a reci rocating awl and a reciprocating driver, oth mounted on the head, the limit of the effective stroke of the driver varying in accordance with the thickness of the work,'and means to impart a variable oke to the awl relative to the head.

35. In a nailing machine, a rocking head adapted to clamp the work, mechanism, including a rotatable shaft 2 on the head, to lift the head, a slide 92 vertically movable on-the head, a rock-shaft 127 on' the slide having a'cam-follower, a cooperating cam 132 on the said shaft 2, and awl (1 and an awl-bar a to which it is secured, connections between said awl-bar and rock-shaft, to efi'ect reciprocation of the former, and means, including an equalizing lever 100 fulcruined independently of the head and operatively connected with it and the slide 92 to change the position of the slide on the head and through the rock-shaft 127 vary the relative position of the follower and its cam, to vary the operative-stroke of the awlbar inversely to the variations in-t-he distame the head descends upon the work.

36; In a nailing machine, a support A, a head B provided with means including a rotatable shaft 2, to lift itself relatively to the support, the descent of the head being determined by the thickness of the work, an

awl a and mechanism to reciprocate it,

driven from the shaft 2 and mountedgon the head, and controlling means for said mechanismto impart to the awl a.-stroke terminating at a substantially fixed point, said means including a lever 100 having a fixed fulcrum 99 on the support A, and a connected slide 92 on the head.

37. In a nailing machine, a movable head provided with means, including a rotatable shaft 2, to lift itself, wire-feeding mechanism on the head, including cooperating jaws 108, 111 mounted on a vibrating j aw-carrier 110, a segment 79 fulcrumed at 81 and having a block 77 movable toward and from the fulcrum and connections between the block and the jaw-carrier, to oscillate it and effect feed of the wire, combined with means to set the block in or out on the segment to decrease or increase the stroke of the jawcarrier.

38. In a wire-nailing machine, a movable head provided with a shaft, means actuated by the shaft to move the head, wire-feeding, severing and nailing mechanisms'carried by the head and operated in a predetermined sequence by movement of the shaft, means to move thelatter, means actuated by operative movement of the head toward the work to set the wire-feeding mechanism before its operation, to thereby cause a measured length of wire to be fed, an intermittingly rec1procated awl mounted on the head, and means to impart a variable stroke to said awl relative to said head and dependent upon the extent of operative movement of said head.

39. In a nailing machine, a head to de-- scend upon and clamp the work, self-contained means to lift the head, a reciprocating awl-bar a, provided with an awl and mounted on the head, a slide 92 vertically movable on the head, connected rocker arms 128, 130, carried by the slide, a follower'131 on one of the arms to cooperate with an actuating cam 132, a connection between the other arm and the awl-bar to reciprocate the latter, and an equalizing connectlon between the head and slide to vary the posi tion of the same upon the -head and chan e the relative position of the cam and fdllower according to changes in the. thickness of the work,'whereby the downward stroke of the awl-bar always terminates at i the same point irrespective of the thiclmess of the work.

40. In a nailing machine, an oscillating head a fixedfulcrum'for said head and opcrating mechanism, carried b said head,

said mechanism includin a c utch, and a controller therefor, a trea e fulcrumed independently of the head, and an operating connection between the treadle and controller, constructed and arranged to substantially absorb or take up vibrations of the controller and prevent their transmission to the treadle.

41. A nailing machine comprising "a fixed support, a head mounted to oscillate thereon and carrying o crating mechanism, and a controller there or also carried on the head and oscillating therewith, a treadle fulcrumed on thesupport, and a connection between the controller and treadle to operate the former, said connection being constructed and arranged to prevent transmission of the oscillation of the head and controller to the treadle when the machine is in operation.

42'. In a nailing machine, an oscillating head carrying operating mechanism and a controller, a starting treadle fulcrumed in dependently of the head, and an operating connection between the treadle and controller, including a, device to take up and prevent transmission to the treadle of move ments of the controller induced by oscillation of the head. i

43. In a nailing machine, a head adapted to intermittingly engage and beat down the work, operating mechanism for and mounted on the head, including a controller, a

starting member mounted independently ofthe head, and a' positive connection between said starting member and controller, said connection including a device to reduce to a minimum head-induced movements of the controller and thereby prevent any ob'ectionablevibration of the starting mem er by and to effect vibration of the head, a

starting treadle having a stationary fulcrum, a stirrup having a rigid de ending extension jointed to the treadle, lin s pivotal'ly connected at their upper ends with said stirrup and at their lower ends jointed to the controller, and means to guide the upper ends of the links, in fixed paths, vibrations of the controller being taken up by swinging movement of the links, whereby transmission of such controller movements to the treadle is prevented.

v 46. In a nailing machine, a vertically oscillating head, a clutch-controller carried thereby and movable longitudinal] relatively thereto, to set or release the c utch, av

startin treadle havinga stationary fulcrum, a mem er plvotally connected therewith and 

